<div class="modal-header" model-draggable>
    <h3 class="modal-title">Modal!</h3>
</div>
<div class="modal-body">
    测试内部 {{try1}}
    <button class="btn btn-default" ng-click="try2()">改变测试</button>
</div>
<div class="modal-footer">
    <button class="btn btn-default" ng-click="cancel()">Cancel</button>
    <button class="btn btn-primary" ng-click="ok()">OK</button>
</div>